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Map of the island of Soembawa (Sumbawa) featuring an inset map of the 1815 eruption of Mount Tambora, and an elevation showing heights of mountains. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

A late 18th century maritime navigation map of the straits east of Java, with drawings of the elevations of the straits. The map is also marked with routes of explorers, including the return of Captain Cook’s HMS Endeavour from Australia in 1770.

Hand-drawn portolan (nautical) chart of the Lesser Sunda Islands, featuring a rhumbline network (the web of interconnected lines), shoals, reefs, elevations (side views of landmark mountains), and names of coastal settlements, all to aid navigation.